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UPDATE: High resolution digital prints for canvases or posters now available on Etsy!
https://www.etsy.com/shop/GrasshopperGeography
Thanks for checking it out!
High resolution map of Europe's 1.2 million streams and rivers in beautiful rainbow colours, divided into almost 8000 catchment areas.
I really like this map. There were a few technical challenges along the way, but I think it came out allright. :)
Map made mostly with the open-source QGIS software.